Abstract
We have calculated the low-lying elementary excitations of three-dimensional few-vortex arrays in trapped Bose-Einstein condensates. The number of different Kelvin-Tkachenko vortex wave branches found matches the number of vortices in the condensate. The lowest odd-parity modes exhibit superfluid gyroscopic vortex motion. Experimentally, these modes could be excited and observed individually or in connection with the formation and decay of quantum turbulence.
Original language | English |
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Pages (from-to) | 1 - 5 |
Number of pages | 5 |
Journal | Physical Review A |
Volume | 82 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2010 |